Window-screen



(No Model.)

T. W. BOWLING.

. WINDOW SCREEN. No. 298,675. Patented May 13, I884.

WITNESSES IIVVE/VTOR A fforney mediate of the ends of the Men mares arnnr rerun.

THOMAS WV. DOWVLING, OF DETROIT, MICHIGAN.

wmoow -soesen.

SPECIFICATION forming part of Letters Patent No. 298,675, dated May 13, 1884:. Application filed November 13, 1883. (No model.)

To all whom it may concern:

Be it known that I, Trrorms W. DOWLING, of Detroit, county of Wayne, State of Michigan, have invented a new and useful Improve ment in \Vindow-Screens; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a part of this specification.

My invention consists of the combination of devices and appliances hereinafter specified, and more particularly pointed out in the claims.

In the drawings, Figure 1 is a perspective view of an apparatus embodying my invention. Fig. 2 is a separate View of a portion thereof in perspective. Fig. 3 is a cross-section.

My invention relates to window-screens, and has for its object the construction of an improved screen, which may be adjusted to fit into window-frames of different widths. I accomplish this object as follows:

I construct my improved screen in two parts, the one being the counterpart or duplicate of the other.

As illustrated in the accompanying drawings, A A represent the side portions of the frame of each portion of the screen. B represents the end pieces in each. C is the cross piece or brace. These braces are set in intersides pieces, A A, leaving the ends of said pieces extended, as shown at a. The side pieces at points between the end piece,]3, and cross-piece O are provided with longitudinal dovetailed grooves a, and the solid extensions a, beyond the cross-piece, are each provided with a stud or screw, c the dovetailed heads of which constitute tcnons to engage the dovetailed grooves. Each part or section of the screen is the counterpart of the other, and it will be seen that the dovetailed grooves are at one end of the side pieces, while the dovetailed stud or screen is secured to the solid projecting ends of the side pieces. \Vhen the two parts of the screen are put together, they are reversed end to end, so that the solid portions or extensions of one part provided with the studs or screws comes adjacent to the grooved portions of the other part, the dovetailed heads of the studs or screws engaging the grooves, so that the sections can slideone on the other, to expander contract the screen. This construction and arrangement imparts considerable strength to the screen,while simplifying and reducing the cost of manufacture, and is much more advantageous than those screens where the two portions are provided with dovetailed grooves facing each other and connected by separate metallic dovetailed blocks.

In my Letters Patent No. 229,032 the two parts ofthe screen are not duplicates orcounterparts of each other, and one section only is provided with dovetailed tenons, the other sections having the dovetailed grooves, such grooves extending the entire length of the side pieces, which materially weakens the structure. I avoid this by my present invention,in that I make each section the counterpart of the other.

The dovetailed grooves are only in those portions of the side pieces which are between the end and cross pieces, and the dovetailed stud or screw is secured in the solid extension of the side pieces which project beyond the crosspiece, so that I produce a stronger and more desirable screen, and the sections are prevented from warping and sticking, which is obviously objectionable.

To facilitate the operation of securing the two duplicate parts together, I construct the sockets with a suitable orifice at one end, as shown at a", preferably to one side of the line of the sockets, thereby also tending to prevent the disengagement of the two parts from each other, said parts being engaged readily upon one side, when the frames may be sprung sufficiently to engage them upon the other side in like manner. The sockets are limited to the desired distance to which it may be desired to expand the two parts. By means of the orifice a the frames may be united at one side and sprung together, as described, on the other side, the orifice preventing ment and dispensing with the necessity of inserting a stop for that purpose.

It has been found in practice that by constructing both portions of the frame with said sockets and tenons, whereby the tenons of the their d1sengage-' one will fit into the sockets of the other, a firm bearing is provided and the frame is extended upon each of the middle of the screen, diminishing the liability of the two portions warping and working unevenly, and also removing any difficulty which might otherwise arise from one portion of the frame binding on the other, were only one side of the frame provided with tenons fitting into sockets in the other. More over, this construction is of valuable advantage in the manufacture of the screens, since, the one portion being the duplicate of the other, only one pattern is necessary. When said duplicate parts have been constructed as described, they are ready for engagement with each other, and require no further addition or.

labor.

The netting 0 may be secured upon the separate parts of the frame in any proper manneras,for instance, each duplicate part may be constructed with suitable grooves, 0, into which the edge of the nettingis engaged and secured in place therein by a suitable spline,

c thoughI do not limit myself to this method of securing the netting.

What I claim is A screen-frame constructed of two duplicate parts, the top and bottom pieces of said parts being each provided with a dovetail socket at one end and a dovetail tenon at the other end, said socket being limited in extension to the length to which'the frames may be extended, and having a side orifice, a communicating therewith at one extremity, the construction being such that the two frames may be readily united upon one side, and the opposite sides be united by springing the same sufficiently to engage the dovetail tenon of the one with the dovetail socket of the other, substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

THOMAS WV. DOW'LING.

Witnesses:

N. S. WRIGHT, M. B. ODOGHERTY. 

